the item shell bell is found in Driftveil City, inside the house to the southeast of the Pokemon Center. The guy will check to see if you've seen at least 50 Pokemon, and if you have, he'll give you Shell Bell.
It's in Driftveil city, inside a house southeast to the PokeCenter. A man will check if you have seen 50 Pokemon (at least), and if so, he will give you dat Shell Bell.
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